"jayvee" wrote in message
news:8265d1e03ab7da50d3a6fcdc7a644b1f@homerepairli ve.com...
My chain recently came off. After I put the chain back on and tightened
it, when I would close the door, it would go all the way down then go
right back up and stop in the up position. It willl not stay down.
do I need to reset something?

Sounds like the door 'doesn't think' it's all the way down and has
encountered an obstacle so it reverses out of safety. Go thru the
limit switch adjustment in the install manual. Sounds like you've
mispositioned the chain by a number of links.

lee h